Okay, that's actually pretty interesting. Practically though, no one is going to do that and it probably runs a foul of FCC regulations. I am pretty sure for that company they're not claiming they have the technology which makes use of this in anyway either.
If they use an ISM band the FCC wouldn't care. You wouldn't get cell signals while inside the room, but passive blocking is legal.
Researchers at Disney are probably looking at it because they want some walk-in interactive experience (like their VR stuff) where batteries would either be an ongoing maintenance hassle, or because they have dozens/hundreds of individual objects that would be impractical to recharge by hand. Hmm, like a big room filled with hundreds of mouse sized wheeled robots, or a thousand quadcopters...
